CVE-2026-5245
highpriority · track · 32EPSS 0.007 · 54 %ileEUUSEPSS · scored 2026-10-27
A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 1.7–8.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (22)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (19)
External citations — patches, advisories, analysis.
- https://github.com/cesanta/mongoose/cnnvd
- https://github.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1cnnvd
- https://github.com/cesanta/mongoose/releases/Patchcnnvd
- https://github.com/cesanta/mongoose/releases/tag/7.21cnnvd
- https://vuldb.com/submit/770103cnnvd
- https://vuldb.com/vuln/354826cnnvd
- https://vuldb.com/vuln/354826/cticnnvd
- https://github.com/cesanta/mongoose/enisa_euvd
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